DT*: THE CONTACT STATED WHILE DRIVING 55 MPH ON A DRY HIGHWAY, A SEMI-TRACTOR TRAILER TRUCK JACKKNIFED AND THE CAB OF THE TRACTOR TRAILER TRUCK COLLIDED WITH THE TRUCK HEAD ON. THE AIR BAGS DID NOT DEPLOY AND THE TRUCK WAS TOTALED. THERE WERE THREE PEOPLE INJURED AND A POLICE REPORT WAS TAKEN. SEAT BELTS WERE IN USE AT THE TIME OF THE ACCIDENT AND FUNCTIONED CORRECTLY.